Fig. 3

Evolution of the number of visits to Wikipedia pages over time (2015–2018) for search terms in the countries included. The linear regression curves have the following equation: English (y =  − 4.167x + 202,988; R² = 0.2161), German (y =  − 3.8263x + 172,186; R² = 0.5141), Italian (y =  − 1, 9807x + 88,489; R² = 0.4906)